Consolidated Statements of Convertible Preferred Stock and Stockholders' Deficit (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Series A Convertible Preferred Stock
Shares issued, price per share		$ 1.00	$ 1.00
Convertible preferred stock, Issuance costs		$ 5	$ 7
Series B Convertible Preferred Stock
Convertible preferred stock, Issuance costs	$ 34

Per share or per unit amount of equity securities issued.

No definition available.

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant